{"doi":"10.17615/8xm9-6125","title":"Regulation of the Cardiac Muscle Ryanodine Receptor by O 2 Tension and S -Nitrosoglutathione †","abstract":"The cardiac and skeletal muscle sarcoplasmic reticulum ryanodine receptor Ca2+ release channels contain thiols that are potential targets of endogenously produced reactive oxygen and nitrogen intermediates. Previously, we showed that the skeletal muscle ryanodine receptor (RyR1) has O2-sensitive thiols; only when these thiols are in the reduced state (pO2 ~ 10 mmHg) can physiological concentrations of NO (nanomolar) activate RyR1. Here, we report that cardiac muscle ryanodine receptor (RyR2) activity also depends on pO2, but unlike RyR1, RyR2 was not activated or S-nitrosylated directly by NO. Rather, activation and S-nitrosylation of RyR2 required S-nitrosoglutathione. The effects of peroxynitrite were indiscriminate on RyR1 and RyR2. Our results indicate that both RyR1 and RyR2 are pO2-responsive yet point to different mechanisms by which NO and S-nitrosoglutathione influence cardiac and skeletal muscle sarcoplasmic reticulum Ca2+ release.","journal":"UNC Libraries","year":2020,"id":112710,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":3,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9502,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2020-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":522156,"name":"Jonathan S. Stamler","orcid":"0000-0002-6866-1572","position":1,"is_corresponding":false},{"id":51645,"name":"Le Xu","orcid":"0000-0002-7910-3357","position":2,"is_corresponding":false},{"id":512917,"name":"Gerhard Meissner","orcid":"0000-0001-5185-4389","position":3,"is_corresponding":false},{"id":461835,"name":"Junhui Sun","orcid":"0000-0002-1816-1190","position":4,"is_corresponding":false},{"id":533148,"name":"Naohiro Yamaguchi","orcid":"0000-0001-5933-1507","position":5,"is_corresponding":false},{"id":533921,"name":"Jerry P. Eu","orcid":null,"position":0,"is_corresponding":true}],"reference_count":0,"raw_metadata":null,"created_at":"2026-07-18T23:13:17.845093Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}